The purpose of this qualitative descriptive single case study was to explore how case managers perceive the influence of style, capacity, openness and method of delivery of supportive services on the outcome of the provision of sustainable subsidized housing for homeless people in the southwest region of the United States. The study sample came from a group of 32 case managers who provided direct services in three homeless programs in greater Los Angeles area in southern California. The conceptual framework for this study was Boeree’s view of people’s perception of the world as model. The research questions addressed how case managers perceive the influence of the style, capacity, openness, and method of delivery of services of supportive services on the outcome of the provision of sustainable subsidized housing for homeless persons. Data collected for this study included semi-structured interviews, questionnaires, and observation notes. Findings and conclusions from this study demonstrated that all case managers who participated in this study believe that the approach to the delivery of services of supportive services influence the outcome of the provision of sustainable subsidized housing for homeless persons. Twelve themes emerged from the data relating to the topic and research questions. It is most important that case managers truly understand their approach to stable housing. Hence, the quality of supportive services utilizing community resources, building trust and given the opportunity to make choices were the most common themes identified in the study.